Centrifugal machine.



Nofvzasv. PATENTED MAY 19, 1903.

J. W. MAGPARLANB.

- GENTRIFUGAL MACHINE.

APPLICATION FILED FEB, 25, 1903.

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PATBNTBD v1mm? 19, 1903. J. w.- MAGPARLANB. GENTRIPUGAL MACHINE.

APPLIUATION IILED-FEB. 25, 1903.

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No. 728,737.. f PATBNTED MAY 19, 1903. I .J. W. MAGPARLANE. GENTRIPUGAL`MACHINE.

APPLICATION FILED FEB, 25, 1903.

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UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

CENTRIFUGAL MACHINE.

SPECIFICATION forming part of Letters Patent No. 728,737, dated May 19,1903.

Application tiled February 25, 1903. Serial No. 144.954. (No model.)

T0 all whom t may concern/.-

Beit known that I, JAMES WRIGHT MAC- FARLANE, a subject f the King ofGreat Britain and Ireland, and a resident of Kingston, in the county ofGlasgow, Scotland, (whose postal address is 98 Dundas street, Kingston,Glasgow, Scotland,) have invented certain new and useful Improvements inCentrifugal Machines, (for which I have applied for a British patent,No. 26,716, dated December 4, 1902,) of which thefollowing is aspecification.

My invention has for its object to improve l the construction and actionof centrifugal machines so` as to obtain a better classification orseparation of the syrups, liquors, and washings which are dischargedfrom the centrifugal machine during the operations of purging,liquoring, washing, or steamingof sugar and similar granular substances.

My improvements are shown onfour accompanying sheets-of explanatorydrawings, to be hereinafterl referred to, in which drawings- Figurel isa vertical section, Fig. 2 a sectional plan, and Fig. 3 an elevation,partly in section, at right angles to Fig. 1, showing a centrifugalmachine as made according to one modification of myimprovements. Figs.4, 5, and 6 are partial sectional elevations showing variations incertain details.

In carrying out my invention according to the modification shown inFigs. 1 to 3 the shell 7 of the basket 8 is coned,thou gh it might bemade cylindrical, and it is constructed without the usual perforations.The bottom.

9 of lthe basket is attached by riveting or oth'- erwise at intervals tothis shell, and the effluent liquor is permitted to escape only throughsuitable openings 10, formed, preferably, at the bottom, as shown,though these openings might be at the top of the basket 8 or in anyother plane at right angles to the axis of the machine between thebottom and top of the basket as circumstances determine. These openings10 thus formvpractically a single discharge from the basket. Instead ofplacing the usual perforated linings 11, which act as strainers vorsieves, close against the inner surface of the shell 7 of the basket 8they are supported at a distance therefrom, as shown, by means ofangle-bars 12 or the like, so that an annular space 13 is left betweenthe linings 11 and the basketshell 7, the discharge 10, hereinbeforedescribed, leading from this annular space 13. The shell 7 of the basket8 carries the load, and since it is unperforated it is of considerablygreater strength than a perforated shell of the same weight would be andis thus better able to carry the load. An annular opening 14 is alsoformed around the top of the annular space 13 between the linings 11 andthe shell 7, and a cover-piece 15, secured to the shell and iangedinward and upward over this opening 14 and over the top part 16 of thebasket, forms a chamber 17, which communicates by the opening 14 withthe ,annular space 13 between the shell 7 and linings 11, but not withthe inside of the chamber 8, where the materials being operated upon arecontained. A n injector or nozzle 18, of any suitable known form,projects into this circular chamber 17, and by means of this injectorwater, liquor, or steam or any mixture o f any of these can be injectedinto the circular chamber 17 and through the opening 14E into theannular space 13, and so wash away or dissolve any remaining liquid orsmall grains which have passed through the linings 11 and which thecentrifugal force has not been sufficient t0 completely discharge fromthe interior of the basket-shell 7, thus providing a ready means ofcleaning and/preventing possible choking up of the discharge 10 andlinings 11..

To collect the separate washings as they escape from the basket 8 anddirect them into one or other of the gutters 19 20, by means of whichthey can be led away in any desired manner, there is provided acylindrical screen,

which consists, preferably, of two annular plates 21, joined together attheir upper edges lby an inwardly-projecting lip. 22, the plates beingconcentric with and lone on each side of a fixed annular plate 23,extending up from the bottom of the casing. The screen 21 is of greaterdiameter than the basket 8 and-is capable of being raised or lowered, ashereinafter described, so that the eiluent from the basket will becaught and conducted into one or other of the gutters 19 or 20, providedfor the purpose, according to the position of the inwardly-projectinglipl 22 of the screen 21 IOO relatively to the position of the discharge10, provided for the escape of `the effluent from the basket 8. Toactuate the screen, there is fixed on its outer side a series ofinclines or helices 24. These inclines bear on rollers 25, carried onstuds 26, secured in the xed outer casing 27, or, as shown in Fig. 5,the inclines 24 are stationary, being formed on the fixed annular plate23, and the rollers 25 are carried by the screen 21. When the screen 21is rotated, as hereinafter described, it is raised or lowered by theaction of the inclines 2l and the rollers 25. To rotate the screen 21,there is fixed to it an incline rack 28, which gears, preferably, with acrown-wheel 29, as shown, or it might be a pinion. The croWn-wheel-29.is carried by a stud 30, secured in the casing 27, and is driven by apinion 31 on it, gearing with a rack 32'on a handled shaft 33, movableon end, or, as shown in Fig. 4f,V the crownwheel 29 may be driven bybevel-gearing 34; from a shaft 35, turning in bearings 36, secured tothe casing 2,7, or, according to the arrangement shown in Fig. 5, thecrown-wheel and rack may be dispensed with, in which case a handle 37,attached to the screen 21 and projecting through an openn g of suitablelength in the casing 27, is provided, by means ofl which the screen maybe pulled around, or, as shown in Fig. 6, the screen 21 may carry pins38, engaging in slots 39 in a block 40, rotatable through gearing 41from an external handle 35. On the screen 21 being rotated by any ofthese methods described or by equivalent means it is raised or loweredby the action of the inclines 24 and rollers 25, as herenbeforevdescribed.

What I claim as my invention isl. In centrifugal machines, a baskethaving a solid shell, perforated linings supported in the basket so asto leave an annular space between such linings and the shell, acirculaichamber communicating with this annular space, adischarge-opening leading from such space, and injector mechanismconnected with the circular chamber, in combination withcollecting-gutters and a movable screen for conducting the efliuent intoone or other of the gutters, substantially as described.

2. In centrifugal machines, abasket having a solid shell, perforatedlinings supported in the basket so as to leave an annular space betweenthe linings and the shell, a circular chamber communicating with thisannular space, and a discharge-orifice leading from this space 'withmeans for washing out the annular space and preventing choking of thedischarge and linings, substantially as .de-

i scribed.

3. In centrifugal machines,`the combination with a basket having adischarge-orifice, of collecting-gutters, a cylindrical screen forconducting the eftluent into one or other of such gutters, inclines and4rollers carrying such screen, an inclined rack on the screen, a handledshaft, and gearing connecting such shaft and the rack, substantially asdescribed.

4. In connection with centrifugal machines having discharge-gutters,cylindricall screens for conducting the eiiuent into one or other ofsuch gutters, and operating devices which will rotate and `at the sametime raise or lower such screens, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES WRIGHT MACFARLANE.

Witnesses:

GEoRGn PATTERSON, DAVID FERGUSON.

